author | František Kučera <franta-hg@frantovo.cz> |
Mon, 30 Dec 2013 23:46:41 +0100 | |
branch | v_0 |
changeset 103 | 5410b6afc839 |
parent 101 | 97b0d9069133 |
child 142 | da1e38386d84 |
permissions | -rw-r--r-- |
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/** |
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* SQL-DK |
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* Copyright © 2013 František Kučera (frantovo.cz) |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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package info.globalcode.sql.dk.formatting; |
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import info.globalcode.sql.dk.Parameter; |
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import info.globalcode.sql.dk.configuration.DatabaseDefinition; |
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import java.util.EmptyStackException; |
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import java.util.EnumSet; |
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import java.util.List; |
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import java.util.Stack; |
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/** |
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* |
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* @author Ing. František Kučera (frantovo.cz) |
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*/ |
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public abstract class AbstractFormatter implements Formatter { |
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private Stack<State> state = new Stack<>(); |
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private FormatterContext formatterContext; |
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private ColumnsHeader currentColumnsHeader; |
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private String currentQuery; |
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private int currentColumnsCount; |
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private int currentRowCount; |
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public AbstractFormatter(FormatterContext formatterContext) { |
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this.formatterContext = formatterContext; |
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state.push(State.ROOT); |
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} |
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/* |
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* root |
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* .batch |
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* ..database |
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* ...resultSet |
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* ....@query |
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* ....@parameters |
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* ....@columnsHeader |
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* ....row |
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* .....@columnValue |
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* ...updatesResult |
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* ....@query |
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* ....@parameters |
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* ....@updatedRowsCount |
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*/ |
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protected enum State { |
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ROOT, |
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BATCH, |
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DATABASE, |
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RESULT_SET, |
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ROW, |
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UPDATES_RESULT |
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} |
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/** |
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* Go down in hierarchy. |
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* Pushes new state and verifies the old one. |
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* |
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* @param current the new state – currently entering |
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* @param expected expected previous states (any of them is valid) |
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* @return previous state |
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* @throws IllegalStateException if previous state was not one from expected |
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*/ |
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private State pushState(State current, EnumSet expected) { |
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State previous = state.peek(); |
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if (expected.contains(previous)) { |
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state.push(current); |
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return previous; |
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} else { |
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throw new IllegalStateException("Formatter was in wrong state: " + previous + " when it should be in one of: " + expected); |
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} |
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} |
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protected State peekState(EnumSet expected) { |
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State current = state.peek(); |
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if (expected.contains(current)) { |
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return current; |
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} else { |
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throw new IllegalStateException("Formatter is in wrong state: " + current + " when it should be in one of: " + expected); |
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} |
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} |
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/** |
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* Go up in hierarchy. |
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* Pops the superior state/branch. |
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* |
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* @param expected expected superior state |
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* @return the superior state |
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* @throws IllegalStateException if superior state was not one from expected or if there is no |
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* more superior state (we are at root level) |
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*/ |
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private State popState(EnumSet expected) { |
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try { |
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state.pop(); |
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State superior = state.peek(); |
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if (expected.contains(superior)) { |
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return superior; |
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} else { |
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throw new IllegalStateException("Formatter had wrong superior state: " + superior + " when it should be in one of: " + expected); |
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} |
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} catch (EmptyStackException e) { |
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throw new IllegalStateException("Formatter was already at root level – there is nothing above that.", e); |
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121 |
} |
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122 |
} |
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123 |
|
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124 |
@Override |
91
43e8d52091d5
Formatter: one more level: writeStartBatch() + writeEndBatch() which allows multiple databases on output
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125 |
public void writeStartBatch() { |
43e8d52091d5
Formatter: one more level: writeStartBatch() + writeEndBatch() which allows multiple databases on output
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126 |
pushState(State.BATCH, EnumSet.of(State.ROOT)); |
43e8d52091d5
Formatter: one more level: writeStartBatch() + writeEndBatch() which allows multiple databases on output
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127 |
} |
43e8d52091d5
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|
128 |
|
43e8d52091d5
Formatter: one more level: writeStartBatch() + writeEndBatch() which allows multiple databases on output
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|
129 |
@Override |
43e8d52091d5
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|
130 |
public void writeEndBatch() { |
43e8d52091d5
Formatter: one more level: writeStartBatch() + writeEndBatch() which allows multiple databases on output
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|
131 |
popState(EnumSet.of(State.ROOT)); |
43e8d52091d5
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|
132 |
} |
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|
133 |
|
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Formatter: one more level: writeStartBatch() + writeEndBatch() which allows multiple databases on output
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|
134 |
@Override |
29
d66858b4b563
more configuration, more JAXB, more formatters
František Kučera <franta-hg@frantovo.cz>
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25
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|
135 |
public void writeStartDatabase(DatabaseDefinition databaseDefinition) { |
91
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|
136 |
pushState(State.DATABASE, EnumSet.of(State.BATCH)); |
22
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|
137 |
} |
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|
138 |
|
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139 |
@Override |
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140 |
public void writeEndDatabase() { |
91
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|
141 |
popState(EnumSet.of(State.BATCH)); |
22
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|
142 |
} |
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|
143 |
|
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|
144 |
@Override |
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145 |
public void writeStartResultSet() { |
41
514df5061f59
No special formatting for generated keys. Use 'INSERT … RETURNING id' or 'INSERT … RETURNING *' to get generated keys.
František Kučera <franta-hg@frantovo.cz>
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|
146 |
pushState(State.RESULT_SET, EnumSet.of(State.DATABASE)); |
25
4c118af3e855
formatter: currentRowCount
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|
147 |
currentRowCount = 0; |
22
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|
148 |
} |
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|
149 |
|
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|
150 |
@Override |
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|
151 |
public void writeEndResultSet() { |
41
514df5061f59
No special formatting for generated keys. Use 'INSERT … RETURNING id' or 'INSERT … RETURNING *' to get generated keys.
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|
152 |
popState(EnumSet.of(State.DATABASE)); |
22
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|
153 |
currentColumnsHeader = null; |
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|
154 |
} |
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|
155 |
|
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|
156 |
@Override |
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|
157 |
public void writeQuery(String sql) { |
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|
158 |
peekState(EnumSet.of(State.RESULT_SET, State.UPDATES_RESULT)); |
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|
159 |
|
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|
160 |
if (currentColumnsHeader == null) { |
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|
161 |
currentQuery = sql; |
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|
162 |
} else { |
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|
163 |
throw new IllegalStateException("Query string '" + sql + "' must be set before columns header – was already set: " + currentColumnsHeader); |
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|
164 |
} |
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|
165 |
} |
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|
166 |
|
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|
167 |
@Override |
34
9335cf31c0f2
first working version
František Kučera <franta-hg@frantovo.cz>
parents:
29
diff
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|
168 |
public void writeParameters(List<? extends Parameter> parameters) { |
22
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|
169 |
peekState(EnumSet.of(State.RESULT_SET, State.UPDATES_RESULT)); |
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|
170 |
|
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|
171 |
if (currentColumnsHeader != null) { |
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|
172 |
throw new IllegalStateException("Parameters '" + parameters + "' must be set before columns header – was already set: " + currentColumnsHeader); |
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|
173 |
} |
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diff
changeset
|
174 |
|
88
102ba0fcb07f
TabularPrefetchingFormatter: prefetch whole result set to avoid value overflow the cell
František Kučera <franta-hg@frantovo.cz>
parents:
41
diff
changeset
|
175 |
if (currentQuery == null && parameters != null) { |
22
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|
176 |
throw new IllegalStateException("Parameters '" + parameters + "' must be set after query – was not yet set."); |
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|
177 |
} |
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|
178 |
} |
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changeset
|
179 |
|
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|
180 |
@Override |
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|
181 |
public void writeColumnsHeader(ColumnsHeader header) { |
41
514df5061f59
No special formatting for generated keys. Use 'INSERT … RETURNING id' or 'INSERT … RETURNING *' to get generated keys.
František Kučera <franta-hg@frantovo.cz>
parents:
39
diff
changeset
|
182 |
peekState(EnumSet.of(State.RESULT_SET)); |
22
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diff
changeset
|
183 |
|
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|
184 |
if (currentColumnsHeader == null) { |
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|
185 |
currentColumnsHeader = header; |
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František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
186 |
} else { |
37fe883f8410
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František Kučera <franta-hg@frantovo.cz>
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changeset
|
187 |
throw new IllegalStateException("Columns header can be set only once per result set – was already set: " + currentColumnsHeader); |
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František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
188 |
} |
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František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
189 |
} |
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František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
190 |
|
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František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
191 |
@Override |
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František Kučera <franta-hg@frantovo.cz>
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|
192 |
public void writeStartRow() { |
37fe883f8410
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František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
193 |
pushState(State.ROW, EnumSet.of(State.RESULT_SET)); |
37fe883f8410
formatter: interface and abstract class
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
194 |
currentColumnsCount = 0; |
25
4c118af3e855
formatter: currentRowCount
František Kučera <franta-hg@frantovo.cz>
parents:
24
diff
changeset
|
195 |
currentRowCount++; |
22
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diff
changeset
|
196 |
} |
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František Kučera <franta-hg@frantovo.cz>
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changeset
|
197 |
|
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František Kučera <franta-hg@frantovo.cz>
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changeset
|
198 |
@Override |
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František Kučera <franta-hg@frantovo.cz>
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changeset
|
199 |
public void writeEndRow() { |
37fe883f8410
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František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
200 |
popState(EnumSet.of(State.RESULT_SET)); |
37fe883f8410
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František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
201 |
} |
37fe883f8410
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František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
202 |
|
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František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
203 |
@Override |
37fe883f8410
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František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
204 |
public void writeColumnValue(Object value) { |
37fe883f8410
formatter: interface and abstract class
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
205 |
peekState(EnumSet.of(State.ROW)); |
37fe883f8410
formatter: interface and abstract class
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
206 |
currentColumnsCount++; |
37fe883f8410
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František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
207 |
|
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František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
208 |
int declaredCount = currentColumnsHeader.getColumnCount(); |
37fe883f8410
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František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
209 |
if (currentColumnsCount > declaredCount) { |
37fe883f8410
formatter: interface and abstract class
František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
210 |
throw new IllegalStateException("Current columns count is " + currentColumnsCount + " which is more than declared " + declaredCount + " in header."); |
37fe883f8410
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František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
211 |
} |
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František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
212 |
} |
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František Kučera <franta-hg@frantovo.cz>
parents:
diff
changeset
|
213 |
|
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František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
214 |
@Override |
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František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
215 |
public void writeStartUpdatesResult() { |
37
9e6f8e5d5f98
support SQL commands returning more ResultSets + remove COMMAND_TYPE (type is now derived from result returned from SQL – it is not needed to specify the type on CLI)
František Kučera <franta-hg@frantovo.cz>
parents:
34
diff
changeset
|
216 |
pushState(State.UPDATES_RESULT, EnumSet.of(State.DATABASE)); |
22
37fe883f8410
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František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
217 |
} |
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František Kučera <franta-hg@frantovo.cz>
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changeset
|
218 |
|
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František Kučera <franta-hg@frantovo.cz>
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changeset
|
219 |
@Override |
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František Kučera <franta-hg@frantovo.cz>
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|
220 |
public void writeEndUpdatesResult() { |
37fe883f8410
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František Kučera <franta-hg@frantovo.cz>
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changeset
|
221 |
popState(EnumSet.of(State.DATABASE)); |
37fe883f8410
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diff
changeset
|
222 |
currentColumnsHeader = null; |
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František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
223 |
} |
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František Kučera <franta-hg@frantovo.cz>
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changeset
|
224 |
|
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František Kučera <franta-hg@frantovo.cz>
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|
225 |
@Override |
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František Kučera <franta-hg@frantovo.cz>
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|
226 |
public void writeUpdatedRowsCount(int updatedRowsCount) { |
37fe883f8410
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František Kučera <franta-hg@frantovo.cz>
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diff
changeset
|
227 |
peekState(EnumSet.of(State.UPDATES_RESULT)); |
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diff
changeset
|
228 |
} |
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František Kučera <franta-hg@frantovo.cz>
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changeset
|
229 |
|
101
97b0d9069133
Formatter is now AutoCloseable – so have chance to do some clean up and close the stream, if some error occurs (e.g. lost connection during result set reading)
František Kučera <franta-hg@frantovo.cz>
parents:
98
diff
changeset
|
230 |
@Override |
97b0d9069133
Formatter is now AutoCloseable – so have chance to do some clean up and close the stream, if some error occurs (e.g. lost connection during result set reading)
František Kučera <franta-hg@frantovo.cz>
parents:
98
diff
changeset
|
231 |
public void close() throws FormatterException { |
97b0d9069133
Formatter is now AutoCloseable – so have chance to do some clean up and close the stream, if some error occurs (e.g. lost connection during result set reading)
František Kučera <franta-hg@frantovo.cz>
parents:
98
diff
changeset
|
232 |
} |
97b0d9069133
Formatter is now AutoCloseable – so have chance to do some clean up and close the stream, if some error occurs (e.g. lost connection during result set reading)
František Kučera <franta-hg@frantovo.cz>
parents:
98
diff
changeset
|
233 |
|
24
65e3fffae091
formatter: FormatterContext
František Kučera <franta-hg@frantovo.cz>
parents:
22
diff
changeset
|
234 |
public FormatterContext getFormatterContext() { |
65e3fffae091
formatter: FormatterContext
František Kučera <franta-hg@frantovo.cz>
parents:
22
diff
changeset
|
235 |
return formatterContext; |
22
37fe883f8410
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František Kučera <franta-hg@frantovo.cz>
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changeset
|
236 |
} |
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|
237 |
|
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František Kučera <franta-hg@frantovo.cz>
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protected ColumnsHeader getCurrentColumnsHeader() { |
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return currentColumnsHeader; |
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} |
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/** |
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* @return column number, 1 = first |
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*/ |
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protected int getCurrentColumnsCount() { |
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return currentColumnsCount; |
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} |
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protected boolean isCurrentColumnFirst() { |
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return currentColumnsCount == 1; |
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} |
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protected boolean isCurrentColumnLast() { |
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return currentColumnsCount == currentColumnsHeader.getColumnCount(); |
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} |
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/** |
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* @return row number, 1 = first |
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*/ |
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protected int getCurrentRowCount() { |
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return currentRowCount; |
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} |
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} |